Measuring device



June 27, 1933. R ERICSQN ET A 1,915,850

MEASURING DEVICE Filed Oct. 27, 1930 2 Sheets-Sheet 1 Q 6 \D a0- i) H l! /2 25 24 23 Z/fi P74 Z INVENTORS PH/LL/P RIM/11:51.5)? BY [150365 R Qwcsmv ATTORNEY Patented June 27 I933 eno'neE R. nRrcsoN/Q nmrnn'woon, iirrssonitr, AND rrirniirrin H E ER, or." ALExAnnnI'mv RGrnr p "mmsunme DEVICE" 1 Y a noauon flledoctober 27, mo. Serial no. 491,004."

of this type capable of v accurately measuring the lubricant and. still simpleiand inexpens ve enough to beisatistactory from a'commerc al standpoint. I v

,The objectof this, invention-is to prov de a new and i use in systems ofthis character. I

- The invention willqbe b tter understood upon referenceto the accompanying -draw.v

ingsreferringtowh'ich; T i

-Figure- 1 shows {a longitudinal sectional view of a measuring vfa-lve constructed"; ac cordingtopone embodiment of thislinvention. Figure 2 shows closing spring used in the valveslhown' n Figurel. a .1; j w T .Figure 3 shows a front elevation of the valve shown in Figure. 1. 7 j z 715- Figure 4 showsa side elevation of the valve shownincFig'urel. The reference numeral 1 indicates a 'body member having a cylindrical: bore 2. formed therein. Suitable screw threads 3 are pro-1 videdfor attaching the body member to a bearing or otherdevice to which lubricant is to be supplied. Screw threads tare pro-1 Vided at theother end of thevalve for the purpose of attaching the outlet end f the. supplyconduit. a 7 ,At the inlet end of the device, ail-enlarged bore 5 is provided to receive the end of the supply conduit, and a smaller bore 6 connects the bores 5 and 2. A piston 7 is slidably mounted. in the bore 2 and normallyheld at the inlet end of this bore by a spring Swhichg issupported by a perforated plug 9, as shown. The-perforated plug 9 tor-ms a check valve seatwhich isnormally closed- ,by a ball check valve 11 whichcheck valve is normallyheld firmly in closed position by a sprlng The spring is retainedby a plug-13 which 1sre-' tained in the enlarged end of the bore 2 by 7 any suitable means, such as screw threads14.

improved measuring valve for;

a detail view of the valve The .9 may be made of fibre, hard 7 leather, wood, or metal, but it should be noted that a fairly good seating of the valve 11 is important, andthis seating of the valve should bemaintained against an inlet pressure, ofv 3 substantial force,rforinstance, twenty-five pounds per square inch. This figure is not intended as a limitation in any sense but theillustration is taken for the purpose of pointing out that'the valve 11 does not open under anegligible pressure, for a reasonhereafter to be explained.

boss 15 is formed on the side of the body member 1 andfisprovided with, a bore 16 terminating in a shoulder 1' 7 smaller bore 18 provides communication between the bores candle, Aspring washer 19is located in the endof the bore 16 against the shoulder 17. This-spring washer has a central lip or contorniation 20, as shown in Fi ure 2. A valve seat member 21 is tted to the bore 'l'6and serves to hold the spring washer19 in place. The member 21 is provided with a bore terminating in a recess 23-. adj aeent the spring washer'19. A valve is mounted in the bore22 and provided with a head to close against the inner end of the; bore 22, This valve is .norm-ally biased to closed positionby washer, but a diaphragm 25 is unt dfl fl' against the end of the member21 in such a manneras to rest on the end of the va-lve'stem 24 ,.and a spring 26 of greater strength thanthe'spring'20rests against the outer side of the diaphragm-so as to hold the valve 24- in r p s io I A hollow plug 27 is screwed or pressed down firmly, as, for instance, by threads28, against the diaphragm 25 and accordinglyserves to;h'old the diaphragm and also the member "21 in place. hollow plugserves as a retainer for the spring 26, as shown, being' providedwith a chamber29 to receive the spring'fand: this'chamber is vented as at "sothat atmospheric pressure will be main- I tained' in the chamberiat all .times. 'A cross bore 31 in the member 2 1 terminates in an annular recess: 32, 1 Adiagonal' bore '33 provides cammuni tion between the recess 32 and that portion of the bore 2 which is normally between the piston 7 and the plug 9.

It will be understood that while we have shown the elements of one form of the new and improved valve, we do not wish to be limited to the exact structure shown, for there are many modifications and improvements ,7

which would. obviously be within the scope of the invention. j The operation of the device is as follows: Lubricant is supplied to the bore6 under intermittent pressure from any convenient source-for instance, such devices as shown in the Skelly or Fitzgerald patents might be used. It will be-understood, of course, that.

. there must be some means for accomplishing at least-a partial relief of the pressure between the impulses,but it is not necessary that the source-should permit the actual return of 'large quantities of lubricant after the pressure impulses.

The degree of pressure which may remain in the bore 6-is determ'inedflby-the pressure of the spring 8 when the plunger 7 is at the outlet end of'its stroke for the pressure must be reduced sufficiently to'permit the initia-- total pressure available is fifty pounds, the;v combined strength of'the springs 12 and 8- should not exceed thirty-five pounds, and the spring 8 should have a sufiicient number of convolutions or beso designed that a pressure of not over forty pounds will move theplunger 7 to the end of its stroke with sufficient force toalso'overcome the spring 12.-

The combined strength of the spring 26 and the diaphragm 25 should .be such that the diaphragm will move toward the'left, as indicated in Figure 1, and permit the valve 24 to close at a pressure substantially below twentys five pounds. In other words, the valve 24 must always close before'the check valve 11 opens. The stroke of theplunger 7 may be limited either by the spring 8 itself, or suitable stop means may be employed. 1

When lubricant is supplied to the device under pressure, it first passes through the some, past the valve 24 and through passages 22, 31. 32, and 38, to the outerend of the cylindricalbore 2. When sufficient pressure is'built up, say, ten pounds, the diaphragm 25 is forced outwardly against the spring 26, and the valve 2451s closed by the lip 20. v

I As pressure, continues to build up, the plunger '7 is forced toward the check valve 11 which accordingly opens and lubricant is .or partially'relieved, the plunger 7 can move toward the inlet sufficiently to relieve the pressure on the'inner'surface of'the' diaphragm 25. This diaphragm then causes the valve 24 to open, and the plunger 7 then completes its return stroke, by-passing lubricant through the bore 22 and the passages 31 and 33 tothe bore 2 on the outlet side of theplunger, and the device is then ready for another operation. V

We claim: s w

1. A measuring device of the class de-' scribed comprising an intermittently oper ated measuring piston, valve means for bypassing lubr'ieant during-return strokes'of the piston to-be discharged by saidpiston at the next forward stroke, and means for controlling said valvemeans comprising a-dias phragm exposed on one side to atmospheric pressure and on the other to lubricant pre's sure. V i

2. In a lubricant measuring device, a body= member having a cylinder therein, an intermittently operated piston for said cylinder, said cylinder havingjaninlet' adapted to re ceive lubricant-under intermittent pressure,

an outlet, a check valve-in said outlet, a bypass in said body member connecting said inlet and-said outlet at least while the piston is at the inlet end of the cylinder, and means comprising a member exposed to and movable by said intermittent pressure forcon- Y trolling said by-pass, said' controlling means being movable separately from saidpiston.

3. measuring valve comprising a body: member having an inlet andan outlet connected-by a bore, a piston normallyfclosing' saidbore, a passageway for by-passing lubricant around said-piston, valve adapted 'to' close said by-pass, and a movable wall nor-' mallyholding saidvalve in open position;

one side of said wallbeing exposed to pressure in said by-pass.

4. measuring valve comprising a body memberfhavingan inlet and an outlet connected by a'bore', a piston normally closing said bore, a passageway for by-passing'lubri cant around said piston, a valve adapted to close said by-pass, and a movable wall nor mally holding said valve in open "position, one'side of said wall being exposed to. pres sure in said by-pass, and the otherside of said wall being exposed to atmospheric pressure. 5. In a device of the class described, measuring valve comprising a body member having a cylinder therein, a piston reciprocable in 'saidcylinder, inlet andoutlet passages connected withthe said cylinder, a'by-pass onnecting said inlet and outlet passages,

pressure operated means being operative to close said by-pass valv'e at a pressure lower i than the pressure at which said outlet check valve opens.

' In testimony natures. Y I GEORGE R. ERICSON.

PHILLIP R. WHEELER.

whereof, .we aflix our sig- 

